#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 0.0 0.0 26.711212427139287 57.40871635892854 -gcp 10575.0 0.0 26.70989814472199 57.38197397578237 -gcp 10575.0 10683.0 26.660262315750124 57.38276618285979 -gcp 0.0 10683.0 26.66182872581482 57.40947926338453 Aluksne-1989-1186/Aluksne-1989-1186-170.jpg Aluksne-1989-1186-170.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "1095.0 996.0\n9510.0 1080.0\n9396.0 9594.0\n990.0 9507.0" | \
  gdaltransform -tps -output_xy Aluksne-1989-1186-170.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  Aluksne-1989-1186-170.vrt Aluksne-1989-1186-170.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES Aluksne-1989-1186-170.cut.vrt Aluksne-1989-1186-170.xyz